Detachable rim for pneumatic tires.



W. B. GOPITHORN. DETAGHABLE RIM FOR PNEUMATIC TIRES.

APPLICATION FILED JUNE 20, 1910.

Patented J an. 2, 1912.

2 SHEETS-SHEET 1.

wa'aaa Ga W. E. GOPITHORN.

DETAOHABLE RIM FOR PNEUMATIC TIRES.

, APPLIUATION FILEDJUNE 20, 1910.

1,013,374, Patented Jan., 2, 1912.

v 2 SHEETS-SHEET 2.

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'E'DfsTEs r ENT WALTER E. COPITHORN, OF NATICK, MASSACHUSETTS.

DETAGHABLE RIM FOR PNEUMATIC TIRES.

Specification of Letters Patent.

Patented Jan. 2,1912.

Application filed June 20, 1910. Serial No. 567,779.

T 0 all-whom it may concern:

Be it known that I, WALTER CoPr-' THORN, "a citizen of the UnitedStates, residing at Natick, county of Middlesex, and State ofMassachusetts, have invented an Improvement in Detachable Rims'forPneumatic Tires, of which the following de: scription, in connectionwith the accompanying drawing, is a specification, like characters onthe drawing representing like parts.

Thisinvention relates to demountable or of a wheel having thereon adetachable rim embodying my invention; Fig. 2 is a view of one of thelocking members for holding the detachable rim in place; Fig. 3 is anenlarged section on substantially the line 00-70, Fig. 1; Fig. 4 is anenlarged section taken transversely of the rim at some point between thelocking projections; Fig. '5 is a side view of-the wheel showing anopposite side from that shown in Fig. 1; Fig. 6 is an enlarged sectionalview of the tire and rim; Fig. 7 is a detail view showing the manner ofconnecting the ends of the locking ring 9; Fig. 8 is a detailperspective view of a portion of the wheel rim; Fig. 9 1s a sec-- tionalview taken immediately under the detachable rim 6 and showing the fixedrim 5 in plan and the projections 25 in section; and Fig. 10 is a detailview showing a modified form of the invention. I

In the drawings 3 designates a wheel of any suitable construction havingas part thereof theusual wooden 'felly and felly band or fixed rim 5.

The detachablerifn is shown at 6 and in the embodiment illustrated it isconstructed to receive and cooperate with a-tire 7 of the clenchervariety. Any suitable tire of the clencher variety may be used, but thatshown in Fi 6 is similar to the tire illustrated and d escribed in myco-pending apthus locking the two ends of the ring The finger 12 isprovided w1th a plication Se. No. 548315, filed March 9,1910.

The detachable rim 6 is provided at one sidewith the clencher flange8-and at the other .side with the removable locking ring 9.

Said flange 8 and ring 9 serve to grip the edges of the tire in awell-known way. The

locking ring 9 is a split ring and when in operatlve position the endsare locked together by the locking device shown in Fig. 7. One end ofthe ring is provided with the longitudinal bore 10 which is intersectedby a lateral aperture 11. The other end of the ring is provided with alocking finger 12 having a nose 13. The finger 12 will be inserted intothe bore 10 until the nose 13 enters the aperture 11, as seen in Fig. 7.

gether. spring 14 which will automatically throw the nose 13 into theaperture 11. The ring can be unlocked when it is desired to remove itby-inserting a suitable implement in the aperture 11- to disengage thenose 13 from the wall of the aperture. The ring 9 will preferably beprovided with one or more projections 15 which enter apertures in thedetachable rim 6 and thusprevent any creeping of the locking ring on therim.

The detachable rim 6 1s removable laterally from the wheel body asusual, and

when in position it engages a flange or rib 31 formed on the fixedrim,which flange or I'lm prevents lateral movement of the detachable rim inone direction. Said detachable rim is provided on its inner face withone or more lugs or. projections 16 which are adapted to engage otherprojections 17 extending outwardly from the fixed rim or felly band, theengagement of such projections serving to prevent the tire rim fromcreeping. Inthe embodiment of the invention herein shown said tire rim 6is held in position on the wheel body and in engagement with the flangeor Ill) 31 by means of a locking member which has locking engagementwith a plurality of locking projections carried by the wheel body. Theseprojections are shown at 19 and are illustrated as being secured to thefixed rim 5, but it would be within my invention to sustain saidprojections in any suitable way.

The locking member is shown at 18, and

in the particular embodiment illustrated it is an expansible membercomprising two semi-circular sections which are adapted to engage boththe tire rim 6 and the locking 23 which are adapted to ride up on theproprojections 19. 1 Each locking projection 19 is formed with anoutwardly-directed lip behind which the lock-ing member is re-, ceived,and in the construction shown these lips are formed by making eachprojection with a groove 20 so that the outer wall of. the grooveconstitutes the lip. The por-.

tions ,22 of the' locking member which fit behind the lipsof the lockingprojections are-preferably provided with inclined faces 1 jections asthe locking member is expanded as will be presently described. I havehereas provided w1th mchned faces 21 to co-act in shown the grooves inwhich the ortions. 22 of the lockin member are received with theinclined surfaces 23. The fixed rim is also provided with aprojection24; having two flanges 25 extending therefrom behind which the ends ofthe sections of the locking member 18 may be placed. These lockingmember sections when in position "lieinside of the detachable rim 6 andlie 25 ing member fisections 18 opposite to those against the ends ofthe .projections 16 extendingtherefrom. The ends of the lockwhich arereceived behind the flanges 25 are engaged by a'loeking screw 26 whichoperates to force them apart and thus lock the detachable rim firmly tothe wheel.

In assembling the parts the detachable rim is slipped in position overthe wheel with the lugs 16, 17 in engagement and then the two lockingmember sections 18 are placed in position with the adjacent ends thereofbehind the flanges 25 and the projections 22 occupying the grooves 20.The locking screw 26 is the locki then inserted between the oppositeends of member sections and is screwed into a pro ection-27 secured tothe tire. The locking screw is provided with a conical portion 28 whichby engagement with the ends of the locking member spreads them apart,thus forcing the inclined faces 23 thereof outwardly on the inclinedbottoms 21 of the grooves and expanding the locking members screw 26 andthe locking member 18, an operation which can be very quickly performed.Instead of screwing the locking screw 26 into 2. lug 27 on the. exteriorof the fixed rim 5,- I may screw this into the telly 4 of the wheel, inwhich case the locking memher would have the construction shown in Fig.10, that is, it would be provided with the fingers 29 properly situatedto be engaged by the screw when the latter is screwed into'the felly 4.In this embodiment of my invention the ends of the locking member 18 arearranged to overlap each other, as shown at 30.

The fixed rim 5 is provided with the inclined flange 31 on the sideopposite to that on which the locking projections 19 are located, andthis flange is adapted to'have engagement with the endsof theprojections 16 and is for the purpose of preventing lateral movement ofthe detachable rim 6 toward the left inFig.4.

From the above it will be seen that my improved locking device comprisesa sectional locking member'which has interlocking engagement' with lipsformed on lugs extending laterally from the wheel body and that saidlocking member is expanded outwardly .into engagement with thedetachable rim and by its engagement with the lugs serves to hold thedetachable rim firmly in place.

Various changes in the constructional details of the parts may be madewithout departing from the invention.

' Having fully described my inventiomwhat I claim as new and desire tosecure by Let- I ters Patent is 1'. Inf a wheel, the combination with awheel body, of a detachable tire-receiving rim, as circular expansiblelocking member for locking the detachable rim to the wheel body, and asingle tapered screw screwthreaded into and extending transversely of.the wheel body and co-acting with the look,

ing member to expand it and thereby lock the rim in place.-

2. In a wheel, the combination with a wheel body having associatedtherewith fixed inclined surfaces and a wall or lip adjacent eachsurface, of a detachable rim, an

expansible locking member situated on the interior of the detachable rimand provided with inclined surfaces to engage those associated with thewheel body, and means to expand the locking member, said lips overlyingthe front face of the locking member and holding it in position.

3. In. a wheel, the combination with a wheel body having associatedtherewith locking projections provided with grooves,

of a detachable rim having a projection on its inner face, and a locklngmember situated inside of said rim and engaging-said project-ion thereonand also having projections with inclined faces that occupy saidgrooves, and a screw secured to the wheel lgody and acting to expand thelocking mem- 4. In a wheel, the combination with a wheel body ofprojections on its exterior,

locking projections provided with grooves and extending laterallytherefrom, a detach- .able tire-receiving rim having projections on itsinterior surface cooperating with the projections on the wheel body topreventcreeping of the rim, a two-part locking member provided withinclined faces adapted to accupy the grooves, and a screw to force thesections of the locking member apart thereby to cause the inclinedsurfaces thereon to act on the bottoms of the grooves and expand thelocking member outwardly.

5. In a wheel, the combination with a wheel body, of projections on itsexterior, locking projections extending laterally therefrom and eachhaving an outwardlyprojecting lip at its end, a. detachabletirereceiving rim encircling the wheelbody and having an interiordiameter larger than the exterior diameter of said wheel body, saiddetachable rim having projections on its interior face to cooperate withthose on the wheel body thereby to prevent creeping, and a detachableaiinular locking member encircling said locking projections and havingportions adapted to lie behind said lips, said member beingshaped toengage and press outwardly against the inner face of the detachable rimto hold the latter centered relative to the wheel body.

6. lna wheel, the combination with a wheel body, of locking projectionsextending laterally therefrom and each having an outwardly-projectinglip at its end, a detachable rim encircling said wheel body, means toprevent lateral displacement of said rim, and a detachable annularlocking member encircling said projections and having inwardly-directedportions which lie behind the lips and have bevel faces to engage saidprojections, said locking member being shaped to engage and pressoutwardly against the inner face of the detachable rim to hold thelatter centered.

7. In a wheel, the combination with a wheel body, of locking projectionsextending laterally therefrom and each having an outwardly-proj'ectinglip-at its end, a detachable tire receiving rim encircling the wheelbody, means to prevent lateral displacement of said tire-receiving rimin one direction, a sectional detachable 'expansible locking memberencircling said projections and having inwardly-extending portions whichlie behind the lips and have bevel faces to engage said projections, andmeans to expand said locking member thereby to cause it to pressoutwardly against the inner face of the tire-receiving mm.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

WALTER E. COPITHORN.

Witnesses:

BERTHA F. HEUSER, THOMAS J. DnUMMoND,

